ICMA S301 Instruction Manual

ICMA s.p.a. via Garavaglia, 4 20012 Cuggiono (MI) - ITALIA - tel. [phone] fax [phone]
www.icmaspa.it e-mail: [email protected] pag. 1/4
Specification Sheet 0004/08/Rev00 ING
FUNCTIONS
The S301-S302 controllers are installed in solar heating plants to
govern the system and supervise the thermal interchange between solar
collector panels and power storage in an efficient way, allowing the
installer to regulate the system.
The backlitgh LCD panel display the functions of the controller, its
status and signals out possible malfunctions.
Among other complementary functions, the model highlights the
holiday function which protects the system during long absences from
home and the antifreezing function. The S302 switchboard also allows
the control of thermal stratifications in the boiler.
PRODUCTS
S301 MULTILOOP TEMPERATURE CONTROLLERS FOR HEATING SYSTEMS 2 INPUTS – 1 OUTPUT
S302 MULTILOOP TEMPERATURE CONTROLLERS FOR HEATING SYSTEMS 3 INPUTS – 1 OUTPUT
TECHNICAL DATA
S301 S302
Electrical power supply 230V ~ (±15%), 50Hz 230V ~ (±15%), 50Hz
Self consumption <1W <1W
Inputs N.2 - temperature gauge (Pt1000) N.3 - temperature gauge (Pt1000)
Output N.1 - output command, max. 800W [230V~] N.1 - output command, max. 800W [230V~]
Display Graphic animated LCD Display dual color background Graphic animated LCD Display dual color background
Power-up differential value 4-20K 8K
Power-down differential value 2-18K 4K
Type of protection IP 20/DIN 40050 IP 20/DIN 40050
Room Temperature allowed from 0 to + 45°C from 0 to + 45°C
Weight 250 g 250g
Dimensions 137x134x38 137x134x38
Thermal sensors 2xPt1000 1.5m silicone wire (working range up to 180°C) 1.5m silicone wire (working range up to 180°C)
(supplied with kit)
REGULATING FUNCTIONS
ART. S301-S302 TEMPERATURE CONTROLLERS
FOR SOLAR HEATING SYSTEMS
Art.S301 Art.S302

ICMA s.p.a. via Garavaglia, 4 20012 Cuggiono (MI) - ITALIA - tel. [phone] fax [phone]
www.icmaspa.it e-mail: [email protected] pag. 1/4
TECHNICAL SPECIFICATIONS
The controller continually compares the temperature in the collector (T1) with that in the area below the boiler (T2). Once the collector is heated
up by solar radiations, establishing a thermal difference of 8 K (variable parameter ) the collector, boiler and pump are activated.
The pump sucks the heat-transfer fluid from the lower and cooler zone of the boiler and pumps it towards the collector. The heat-transfer fluid
is heated up in the collector by the solar rays and starts flowing back to the boiler, pumping it towards the collector. In the boiler the heat-
transfer fluid heats the water up for industrial use through a heat-exchanger.
APPLICATION DIAGRAMS
ELECTRIC CONNECTIONS
Safety norms
Before opening the box, disconnect the controller from the power supply.
The equipment must be installed to the grid through a Schuco type of plug
or when dealing with a fixed electric installation, through a disconnecting
switch, on the basis of installation instructions.
Wiring Layout
According to the type of monitoring system, the wires may pass from behind
through the back wall of the box or from the lower part of the box base.
To pass the wires from behind remove the plastic tongue on the back of the
box with a suitable tool (e.g. a pair of scissors).
To pass the wires from below cut off the plastic tongues on the right and
left, and remove them from the box. Secure the flexible lines in the box with
the wire-stop clips supplied with the kit.
Connecting the lines
For connections, the following points must be followed:
-Polarity of sensor contacts is not important
-Lay out the sensor line separately from the 230V or 400V power lines
(minimum distance of 100mm).
-Should there be inductive flows due to excessive power intensity,
transformers, radio-television sets, microwave ovens or similar
appliances, lay the shielded lines for the sensors .
-The sensor lines may be extended up to a length of 100m
With the following types of wires :
0.75mm2 up to 50m long
1.5 mm2 up to 100m long.
Connect the lines as with a scheme of clamps
Make sure that the protection contact is connected to the
controller on the side of the power supply grid.
Use only the original thermal sensors homologated for the
controller (Pt1000)
Art. S301 / S302 Art. S302

ICMA s.p.a. via Garavaglia, 4 20012 Cuggiono (MI) - ITALIA - tel. [phone] fax [phone]
www.icmaspa.it e-mail: [email protected] pag. 1/4
MAIN FUNCTIONS DISPLAY SCREEN
ASSEMBLY AND INSTALLATION
Before opening the box, disconnect the controller from the power supply.
The lid is kept in place by two tongues at the higher corner of the box base and is secured in place with a screw.
Loosen the screw and open the box upwards.
To reclose the box let the box lid lean obliquely against the base.
Insert the grooves of the hinge into the securing tongues of the box base.Close the lid, inserting the command keys into the relevant opening. Close the
box and tighten the screw.
To assemby the box, follow this procedure:
•Perforate the upper hole-way (1)
•To screew
•Dismount the box lid
•Hook the base at the hole
•Mark out the location of the lower holes
•Remove the base of the box
•Perforate the lower hole points (2-3)
•Re-hook the base to the hole
•Screw the base at the lower holes
•Mount the lid on
Automatic boiler loading
The controller constantly compares the temperature on the collector (T1) with that of the
lower boiler (T2). The moment the collector’s temperature (T1) exceeds 8K (Variable
value) the temperature in the collector (T2), will appear on the screen with the sun symbol.
If the safety threshold does not prohibit the pump function, the pump itself will be start
functioning.
The display will show the symbol of the pump wheel.
If the difference in temperatures lowers below 4K (Variable value) the pump is turned off.
The sun symbol will disappear from the screen.
Maximum t boiler emperature
If the lower part of the boiler (T2) reaches the set maximum temperature (preset at 60°C),
the loading will stop. Loading will be possible only at a starting temperature of 3K below
the accumulator’s maximum temperature.
The screen will display the following messages:
- the symbol of the pump at a standstill
- the sun symbol
- the message max in the boiler’s symbol which will be flashing
Maximum temperature of the collector
In the event of strong solar heat radiation, the temperature (T1) of the heat-transfer fluid
may exceed 130°C. The heat-transfer fluids will then evaporate. Should this occur the
pump will stop, as a protection, until the temperature does not lower once again below
127°C. The screen will display the following messages:
The symbol of the pump at a standstill
The sun symbol
The flashing of the vapor symbol.
Functions of the evacuated tube collectors
For installations with evacuated tube collectors start up function (6)
According to their construction, it may occur that in evacuated tube collectors the metering
of the temperature of the collector (T1) may be inexact. In this event, the solar circuit must
be started up periodically for a short period, to allow the tube collector to convey the heat
effectively to the sensor (T1). If the tube collector is working, the controller automatically
turns on the pump for 30 seconds every 30 minutes. The temperature symbol T1 of the
sensor is displayed at the lower right of the screen.
Holiday function (3)
During summer, the boiler may heat up excessively because of strong solar heat radiations,
or when the water is not used for a long period. If the function is active, the boiler is
automatically cooled. The holiday symbol appears on the screen.
Anti-freezing function (4)
If the anti-freezing function is active the temperature controller turns on the pump the
minute the temperature of the collector goes down below +5°C. In this way the heat-
transfer fluid is heated up and prevents freezing. When the collector reaches a temperature
of +7°C, the pump is once again deactivated.
NOTE
The temperature in the upper part of the boiler is displayed only if it has also
been connected to the temperature sensor T3 (not included in the supplies). Select
the temperature sensor by using the ▲,▼buttons to display the actual metered
temperature.
In the event of a short circuit of the sensor T3 the recycle system does not stop.
For repairs, request the assistance of a specialized technician.

ICMA s.p.a. via Garavaglia, 4 20012 Cuggiono (MI) - ITALIA - tel. [phone] fax [phone]
www.icmaspa.it e-mail: [email protected] pag. 1/4
START UP
During assembly or start up, various types of dangerous circumstances may occur ( in the event of assembly errors):
•Danger of death due to electric shock
•Danger of fire due to shortcircuits, erroneous lay out
•Damage to the controller and to the connected equipment in the event of prohibited environmental conditions, faulty equipment,
assembly or erroneous installation.
All the interventions that require the opening of the controller must be performed exclusively by specialized technicians. Ensure furthermore
that:
•The laying of wires respects the safety norms against fires.
•That the type of protection is not inferior to the type prescribed
•Ensure that the technical data of the equipment connected to the controller correspond with the technical data of the controller
•Disconnect the equipment from the electrical power before carrying out maintenance works.
•Protect the controller against overloads and shortcircuits
MAINTENANCE
The controller was manufactured to last for many years and should not require maintenanceby the user.
Despite this, breakdowns may still occur . Maintenance must be performed only by qualified personnel.
PROHIBITED USE
The controller cannot be used in the following environments:
•In open air
•In humid facilities
•In facilities where a mix of easily inflammable gas may accumulate
•In environments where danger may arise due to electrical faults.
SAFETY
Safety warnings
Read the assembly and start up instructions carefully before activating the device, so as to avoid accidents and breakdowns to
the plant caused by improper use. Remember that warranty rights expire if the device is modified or mishandled without the
proper authorization during assembly or installation. Respect all the safety warnings, and when in doubt, request the help of
qualified personnel.